Mapei Primer SN Two-Part Filled Epoxy Primer, Part A and Part B
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- Two parts, both needed: Part A resin plus Part B hardener
- Strong bond for Ultratop toppings and resin floors
- Can go on damp concrete
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Description
Description
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Use it for: Two-part, filled epoxy primer for concrete. The two parts are mixed together and you need both: one Part A resin pail (2.17 US gal) plus one Part B hardener jug (0.83 US gal) makes one 3 US gal (11.4 L) kit. It improves the bond of Mapei cementitious flooring systems and self-levellers, Ultratop toppings, and multilayer epoxy and polyurethane resin floors such as Mapefloor and Planitop EL. Parking decks, warehouse floors, labs, and wet or dry processing areas. Can go on damp surfaces. Sand can be broadcast into it for extra mechanical bond, and Mapei requires it, with a full sand broadcast, under Ultratop PC. Tack-free in 3 hours and foot traffic in 4 to 6 hours (at 23°C).
Not for: Exterior on-grade slabs, or areas where the relative humidity is above 85%. Don't split a kit or thin it with water or solvent: mix all of Part B into all of Part A. Concrete must be mechanically profiled to CSP 3, with cracks over 1/32" (1 mm) repaired, and be at least 2.8°C (5°F) above the dew point. Use between 8°C and 35°C, and keep water and condensation off it for 24 hours. Tools clean up only with a solvent such as xylene, before it cures.
Use instead: Solvent-free, low-odour priming of concrete before a Mapei self-leveller: Primer L. Priming epoxy moisture barriers and other non-porous surfaces before a self-leveller: Primer X.
Priming concrete for an Ultratop topping or a resin floor? Primer SN is a two-part, filled epoxy primer that gives cementitious and multilayer resin flooring systems excellent adhesion to concrete. It is low-viscosity and easy to apply by squeegee, roller or brush, and it can go on damp surfaces.
Primer SN comes in two parts that are mixed together, and both are needed. Each kit is one Part A (2.17 US gal) plus one Part B (0.83 US gal): pick each part from the dropdown and add the same number of each to your cart.
Kit: 3 US gal (11.4 L) when Part A and Part B are combined · Coverage: about 267 sq ft per US gal at 6 mils · 100% solids
Mapei labels Primer SN for professional use only. Pot life is about 1 hour at 23°C, so mix only when you are ready to apply the whole kit.
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